--
The removal of the unmaintained claws-mail version from gpg4win
has been requested by Andrej Kacain [1] on gpg4win-devel.
A maintained claws-mail Version is available as a standalone installer
from claws-mail.org.

Due to the removal of regex and pthreads-w32 GPG4WIN_PARALLEL
can now also be used properly.

--
The only difference to the old package is that this package
includes HTML documentation for de and not only the index
docbook. Yes the way kleopatra is included in gpg4win currently
is not nice,.. Too much manual work involved.

--
Curl now uses pkg-config to find gnutls, this fails as
gnutls is not configured to be installed in the stow directory
and pkg-config does not report this directory as libdir
for gnutls. So set LIBS and CPPFLAGS to look for includes
and libaries in the installation prefix.